a) Ampereb) Ampere-hour
c)Wattsd) Watts-hours
45.The following is not used to measure angles: -
a) Bevel protectorb) Calibrated levels
c) Clinometersd) Optical flats
46.Which of the following gas mixture is not used in Gas Tungsten arc welding?

48.The degree of closeness of the measured value of certain quantity with its true value is known as: -
a) Accuracyb) Precision
c) Standardd) Sensitivity
49.In an automobile engine, indication of knocking is available in the form of: - a) Lightb) Gasc) Soundd) None of these
50.A transistor is aoperated device.